.chess {
  width: 100px;
  height: 100px;
  outline: 2px solid lightgray;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.chess .chess-item {
  width: 60px;
  height: 60px;
  border-radius: 50%;
}
.chess .red {
  background: radial-gradient(#fff, red);
}
.chess .black {
  background: radial-gradient(#fff, black);
}
